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Re: fpucw setting: Test and Question

To: Andreas Jaeger <aj at suse dot de>
Subject: Re: fpucw setting: Test and Question
From: Ulrich Drepper <drepper at redhat dot com>
Date: 05 Jul 2000 15:17:42 -0700
Cc: GNU libc hacker <libc-hacker at sourceware dot cygnus dot com>
References: <u8g0pql3gd.fsf@gromit.rhein-neckar.de>
Reply-To: drepper at cygnus dot com (Ulrich Drepper)

Andreas Jaeger <aj@suse.de> writes:

> On i686 the program outputs:
> 
> $ cat math/test-fpucw.out 
> control word is 0x37f but should be 0x137f.
> 
> What's the right value?  The kernel uses 0x37f but glibc also sets
> 0x1000 which seems to be a reserved bit.  Why do we set this?

It doesn't matter.  The 0x1000 bit is only interesting for 8087 and
80287.  We can go to 0x37f.

-- 
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Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
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References:
- fpucw setting: Test and Question
  - From: Andreas Jaeger

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